Bruchmechanische Untersuchung geschichteter Piezoelektrika unter dynamischer Belastung mit Hilfe von Randelementmethoden

这一建议是基于考虑力电耦合效应的压电材料动态断裂过程的研究。这一分析将有助于提高压电元件的性能和预测其可靠的使用寿命。该方案的目的是建立一种有效的Biem数值工具，用于求解有限裂纹多层压电体的二维力-机耦合动力学问题。该方法是机电耦合动力学问题的扩展BIEM法。所提出的方法的准确性将通过解决适当的测试实例来研究。对扩展应力强度因子进行了裂纹尖端建模和计算。参数研究结果揭示了扩展裂纹场对不同时间简谐和瞬时耦合载荷下的动力学参数的敏感性。

The proposal is motivated by the dynamic fracture processes evaluation in piezoelectric materials (PEM) with consideration of the coupled mechanical and electric effects. This analyze will be in help to improve the perfomance and to predict the reliable service lifetime of piezoelectric components. The aim of the proposal is a creation of an efficient BIEM numerical tool for solution of 2D electromechanical-coupled dynamic problem for a finite cracked multilayered piezoeletric body. The solution method is the extended BIEM for the coupled electromechanical dynamic problem. The accuracy of the proposed method will be studied by a solution of appropriate test examples. The crack-tip modeling and calculation of the extended SIF will be done. Parametric study results revealing the sensitivity of the extended fracture field on the dynamic parameters of the different time-harmonic and transient coupled loads will be obtained.